GrimmSpeed GRM093076 Top Mount Intercooler Splitter for Subaru STI 04-05

Vehicle Fitment

• 2004-2005 Subaru Impreza WRX STI (with OEM STI Hood Scoop)

Fitment Notes

• This item will only fit vehicles equipped with the 04-05 STI hood scoop
• Compatible with both the GrimmSpeed and OEM top mount intercooler (TMIC)
• Intercooler is not included
• WARNING: Cancer & Reproductive Harm - for more information, go to www.P65Warnings.ca.gov

Features

• Delivers a 70% increase in flow capacity to the top mount intercooler (TMIC)
• Fully harnesses the incoming air from the STI hood scoop, ensuring maximum surface contact with the intercooler core
• Designed for even flow distribution across the entire intercooler core, maximizing cooling effectiveness
• Lowers TMIC outlet temperatures, enabling more aggressive tuning and more consistent power delivery during sustained boost
• CNC laser-cut 5052 aluminum construction for durable, lightweight strength
• Durable DuPont black powder-coated finish resists corrosion and wear
• Custom EPDM rubber gasket provides an excellent, long-lasting seal
• CAD-designed and simulation-validated for a precise fit against the STI scoop and intercooler
• Backed by GrimmSpeed's limited lifetime warranty

Specifications

• Type: Top Mount Intercooler Splitter (Hood Scoop Splitter)
• Flow Increase: +70% to TMIC
• Material: 5052 Aluminum, CNC Laser-Cut
• Finish: Black DuPont Powder Coat
• Gasket: EPDM Rubber
• Compatible Scoop: OEM STI Hood Scoop (04-05)

Included Components

• 1x Top Mount Intercooler Splitter
• EPDM Rubber Gasket
• Mounting Hardware

Product Description

The GrimmSpeed GRM093076 splitter replaces the restrictive factory splitter on 04-05 STI models, fully harnessing the incoming air from the hood scoop to maximize surface contact with the top mount intercooler. Rather than letting ram air bypass the intercooler fins, this splitter channels it directly onto the core, delivering a 70% increase in flow capacity for genuinely improved heat rejection.

Built from CNC laser-cut 5052 aluminum with a durable black powder-coated finish and sealed with a custom EPDM gasket, this splitter is engineered for a precise, long-lasting fit against both the OEM STI scoop and the top mount intercooler - whether running the GrimmSpeed unit or the factory core. Lower charge air temperatures and reduced heat soak risk translate into more consistent power delivery and greater headroom for aggressive tuning, backed by GrimmSpeed's limited lifetime warranty.